docs: def get_unspents(self):
          """Fetches all available unspent transaction outputs.
  
          :rtype: ``list`` of :class:`~bitcash.network.meta.Unspent`
          """
          self.unspents[:] = NetworkAPI.get_unspent(self.address)
          self.balance = sum(unspent.amount for unspent in self.unspents)
          return self.unspents